/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/IntrinsicCorrespondenceUtils.h
true if the specified intrinsic edge ( indicated by IntrinsicEID) is a segment of a surface edge. Note:Byconstruction the initial intrinsic edges will have the same ID as the corresponding surface mesh edges, but edge splits will disrupt this. Also note: it is the responsibility of the caller to ensure IntrinsicEID is a valid edge on the intrinsic mesh.
bool IsSurfaceEdgeSegment ( const int32 IntrinsicEID ) const